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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac19f6aad4aeb0c8b5724dd0593936f7618cf89974eaa2d1c0322f3a0316bb41' 
  AND token = 'bUyvujo6Wk1gdOBTZSmIHTWfXWkxAfJy4aIBJlb8d1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}